Pressure gauge



P. GAISER.

PRESSURE GAUGE.

APPITICATION FILED MAR. 5. 1920.

1,414, 1 22, Patented Apr. 25, 1922;

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PAUL GAISER, OF SELLERSVILLE, PENNSYLVANIA, ASSIGNOR TO UNITED STATES GAUGE COMPANY, OF NEW YORK, N. 2.. A CORPORATION. OF PENNSYLVANIA.

PRESSURE GAUGE.

has Widely spaced markings for accurate reading and the other of which has more closely spaced markings for more approximate readings over a wider rangeof pressures. v

Another object is to provide a construction which can be readily adjusted so as to. coordinate accurately the indicating pointer and the upper scale readings.

Another object is to insure permanence of accuracy even though the device is subjected to severe handling. 7

Another object is to provide a construction in which the accuracy of the gauge in the 7 form of retar upper scale readings is independent of the casing.

In its simplest form the invention contemplates the employment of a small adjustable spring carried by the frame or base of the tube and interposed in the path of .movement of the multiplying sector.

. Fi -1 is a front view of a gauge embodying t e improvements of my mvention indicating conventionally a part of the usual glass front. Fig. 2 is a front view with the dial removed and showing only a fragment of the casing.

Fig. 3 -is adetail perspective view of the retard device.

Fig. 4 is a erspective view of a modified device. The Bourdon tube 5 is of the usual type supported by a base 6 adapted to be secured on to the pipe or nipple of the s stem or device whose pressure is to be in icated.

The pointer 7 is mounted on a pivot shaft- 8 which is supported in the usual frame 9. 1 The pinion 10 on the shaft 8 is engaged by" I A bend of the U comes approxlmately over a sector 11 pivoted at 12 in the frame.

slotted arm 13 of the sector is connected by.

Specification of Letters Patent.

Patented Apr. 2 5, 1922.

Application filed March 5, 1920. Serial a... asaeao.

tween the tube and the sector may beeffected. A spring 15 connected at one end to the frame 9' and at the other end to the shaft 8 tends to hold the pointer at zero pressure in the tube against the stop 16. The dial 17 has suitable graduations in any desired-system of units from say zero up to 10 which may be termed the lower range of movement of the tube and pointer. Beyond this range the scale readings are much closer together and through a small angular movement a pressure 0 .several times the total pressure of the cated. V

This modified action is accomplished by interposing a spring 18 in the path of movement of the sector 11 which comes into play when the pointer reaches the upper end of the lower scale range. This spring is preferably carried by a socket 19 which is screw threaded into the base 6 of the frame of the tube and multiplyin mechanism. This socket may be provide with holes such -as 20 to facilitate adjustment of the socket and spring up and down so that the retard action of the spring 18 will begin when the I inter 7 reaches theindicating line marks 1.0 on

the scale; A set nut 21 may be provided for preventing the socket 19 from working loose.

The parts are so constructed and arranged that the retard s ring can be assembled together with the ourdon tube'an'd multiple mechanism and adjusted by means ofajig or gauge before the parts are assembled in the casing 22. The mechanism may be, secured to the casing'by one or more screws 23 in I the usual manner. The spring 18 being smalland light in weight, is not likely to be bentor displaced by impact or shock in transportation or otherwise. Furthermore,

the spring being in no wise connected to any of the moving parts, it has absolutely no effect upon their movement at any time during the lower scale movement of the pointer.

11 Fig. 4 I have shown another orm of spring which I believe comes within the broad scope of my invention althou h the specific form was not devised by me. in this case the spring 24 is U-shaped and secured by a screw 25 directly to the frame 9. The

the pivot axis 12 of the sector 11 so that the bent end 26 which is interposed in the path of movement of the sector 11 will have sub- Other modlfications oi the idea may be made within the broad scope of my invention without departing from its spirit or scope.

I claim:

1. Ina retard pressure gauge, a casing, a base secured therein, a Bourdon tube carried by said base, an indicator carried by said base, operating means of connection between said tube and said indicator, and an adjustable sprinw retard stop carried by said base independently of said casing, for engaging and checking the movement of a part of said means of connection.

tor an intense 2. In a gauge construction, a Bourdon tube, a base for one end of said tube, a pointer moving sector connected to the other end of the tube and a spring carried by said base and located in the path of movement of and serving to modify the movement of the seea casing lnciosing said parts.

3. In a pressure gauge, a base, a Bourdon tube having one end secured to said base, an indicator carried b said base, means of connection between t e movable end of said tube and said indicator, a socket adjustably seated in said base, and a spring carried by said socket for co-acting With a part of said connecting means. A

PAUL GAISER. 

